#include "csapp.h"

int main(int argc, char **argv)
{
	int n;
	rio_t rio;
	char buf[MAXLINE];

	Rio_readinitb(&rio, STDIN_FILENO);
	while ((n = Rio_readlineb(&rio, buf, MAXLINE)) != 0)
		Rio_writen(STDOUT_FILENO, buf, n);
}
